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Thermal mass

1,002 bytes added, 09:49, 7 October 2012
{{Wikipedia}}Good '''thermal mass''' is an important part of [[passive solar]] and [[energy efficient building]] design, and contributes to an [[energy efficient]] building. 
==Basic definition==
 '''Thermal mass''' is a heat storage material, such as [[wateras thermal mass|water]], [[concrete ]], [[masonry]], or masonry[[earthen construction]], used in [[solar thermal energy]] systems also known as [[passive solar heating]] systems. With passive solar heating, the house itself acts as the solar collector and the storage facility. The essential elements of a passive solar system are:
* excellent [[insulation]],
* [[solar collection]] (with south-facing windows), and
==Types of passive systems==
 There are three categories that passive systems can fall into. :
===Direct gain===
Finally, the third category of these passive solar heating systems is an attached greenhouse on the south side of the house. The greenhouse acts as an expanded thermal storage wall. It will share some of its heat with the adjoining house.
==Thermal mass and R-value==In very limited and specific situations, uncommon during the heating season, thermal mass can marginally increase the apparent [[R-value]] of a building assembly such as a wall. Generally speaking [[thermal mass]] and [[R-value]] are distinct thermodynamic properties and should not be equated. Thermal performance problems apparently seen in some earthship designs may have occurred because of thermal mass being erroneously equated to [[R-value]]. According to the [ Kansas State University Extension Service] the R-value of soil is about 1 per foot. ==See also==* [[Earth sheltering]] == External links ==* [[Wikipedia:Thermal mass]] {{Solar navbox}} [[Category:SolarPassive solar]]
[[Category:Thermal insulation]]


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